323000421 - E4010 INSTRUMENT PANEL - FUNCTIONAL DESCRIPTION
FUNCTIONAL DESCRIPTION
The ignition-controlled power supply (INT) for the instrument panel E050 reaches pin 3 via the line protected by fuse F37 of the junction unit under the dashboard B002; the direct battery suppply arrives at pin 2 of E050 via the line protected by fuse F53 of the junction unit B002.Pin 1 of E050 is earthed.The Body Computer receives a power supply from the battery, via the line protected by fuse F1 located in the engine compartment junction unit B001. It also receives an ignition-controlled power supply (INT) from the ignition switch H001. The reference earth reaches pins 10 and 19 of connector A of M001.The "MENU/ESC" "+" and "-" located on the panel to the left of steering wheel H091 (pins 4 and 12) send analogue signals to pins 13 and 16 respectively of the instrument panel E050. The reference earth arrives at pin 1 of H091.The signal relating to the fuel level is managed according to the data provided by the level detector located in electric fuel pump unit N040. The Body Computer provides the sensor with a reference earth (pin 21 of connector B) and receives a proportional signal at pin 7 of the same connector, and forwards it to instrument panel E050 via the CAN.According to the signals received by the sensors at the wheels, the ABS control unit M050 supplies the Body Computer M001 (pin 10 of connector D) with a vehicle speed frequency signal (VSO) from pin 16. The Body Computer, in turn, forwards this signal, via the CAN, to the instrument panel E050.The electronic rev counter receives the engine rpm signal via the CAN from the engine management control unit M010 connected to the engine rpm sensor K046. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The handbrake applied/insufficient brake fluid level warning light is activated by an earth signal from handbrake switch I040 that reaches pin 20 of connector B of the Body Computer M001, or from brake fluid level sensor K025 that reaches pin 24 of connector D of M001.Brake pad wear sensor (switch) K020 controls the associated warning light via a connection with pin 32 of connectorD of Body Computer M001.The information coming from engine management control unit M010, robotized gearbox control unit M054 and ABS control unit M050 reaches pins 44 and 45 of connector D of M001 via the CAN. The information to be displayed in the instrument panel such as the speed, mileage travelled, etc. is processed.These signals reach pins 5 and 6 of the instrument panel E050 from pins 25 and 24 of connector A of M001 respectively, also via the CAN. See E1050 CAN CONNECTION LINES Engine management control unit M010 sends signals coming from the following to the instrument panel via the CAN:- insufficient engine oil pressure sensor (switch) K030;- engine coolant temperature sensor K036;- water in diesel filter sensor incorporated in the filter assembly K101 (diesel versions only). | There is only one direct instrument panel connection to turn on a warning light: this is the EOBD warning light: pin 18 of E050 receives a direct earth signal generated by the diagnostic systemof engine control unit M010. |